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39 条记录 (耗时 0.02 秒)

    Optical head device and optical disk unit capable of stable signal reproduction
    1.
    发明授权
    Optical head device and optical disk unit capable of stable signal reproduction 失效
    光头装置和能够稳定信号再生的光盘装置

    公开(公告)号：US06925046B2

    公开(公告)日：2005-08-02

    申请号：US10100172

    申请日：2002-03-19

    申请人： Maho Kuwahara ,  Katsuo Iwata ,  Shintaro Takehara ,  Sumitaka Maruyama

    发明人： Maho Kuwahara ,  Katsuo Iwata ,  Shintaro Takehara ,  Sumitaka Maruyama

    IPC分类号： G11B7/004 ,  G11B7/00 ,  G11B7/09 ,  G11B7/125 ,  G11B7/13 ,  G11B7/135

    CPC分类号： G11B7/1369 ,  G11B7/0948 ,  G11B7/1263 ,  G11B7/1378 ,  G11B7/1381 ,  G11B7/13927 ,  G11B2007/13727

    摘要： The present invention relates to an optical head unit and an optical disk unit using the optical head unit. The head unit includes a wavefront transforming optical element control unit to controls a wavefront transforming optical element so as not to transform wavefront of a light beam focused on a recording layer by a focusing unit due to the thickness error of a light transmission layer positioned between the recording layer and the focusing unit based on an electrical signal outputted from a first light detector, and an output control unit that controls light amount of a light beam radiated by a light emitting unit based on the magnitude of the electrical signal outputted from the light detector.

    摘要翻译： 本发明涉及一种使用光头单元的光头单元和光盘单元。 头单元包括：波前变换光学元件控制单元，用于控制波前变换光学元件，以便由于位于第一光学元件之间的光透射层的厚度误差而不能由聚焦单元变换聚焦在记录层上的光束的波前 基于从第一光检测器输出的电信号的记录层和聚焦单元，以及输出控制单元，其基于从光检测器输出的电信号的大小来控制由发光单元辐射的光束的光量 。

    Optical head and optical disk apparatus
    4.
    发明授权
    Optical head and optical disk apparatus 失效
    光头和光盘装置

    公开(公告)号：US06781928B2

    公开(公告)日：2004-08-24

    申请号：US09987724

    申请日：2001-11-15

    申请人： Katsuo Iwata ,  Maho Kuwahara ,  Shintaro Takehara ,  Sumitaka Maruyama

    发明人： Katsuo Iwata ,  Maho Kuwahara ,  Shintaro Takehara ,  Sumitaka Maruyama

    IPC分类号： G11B700

    CPC分类号： G11B7/1398 ,  G11B7/0948 ,  G11B7/123 ,  G11B7/1353 ,  G11B7/1378 ,  G11B7/13927 ,  G11B11/10543 ,  G11B11/10576 ,  G11B2007/13727

    摘要： There are comprised a laser light source for outputting a light beam, an optical disk having a recording/reproducing surface and a transparent substrate on the surface, an objective lens for gathering the light beam on the optical disk, a relay lens system comprising one or more lenses inserted between the laser light source and the objective lens, means for moving one or more lenses in the relay lens system toward its optical axis so as to correct sphere aberration in accordance with a thickness of the transparent substrate of the optical disk, and means for sustaining a diameter of an incident light on the objective lens when one or more lenses among the relay lenses move.

    摘要翻译： 包括用于输出光束的激光光源，具有记录/再现表面的光盘和表面上的透明基板，用于将光束聚集在光盘上的物镜，中继透镜系统，包括一个或 插入在激光光源和物镜之间的更多透镜，用于将中继透镜系统中的一个或多个透镜朝向其光轴移动以根据光盘的透明基板的厚度校正球像差的装置，以及 当中继透镜中的一个或多个透镜移动时，用于在物镜上维持入射光的直径的装置。

    Optical disc and optical disc apparatus
    6.
    发明申请
    Optical disc and optical disc apparatus 失效

    公开(公告)号：US20070019532A1

    公开(公告)日：2007-01-25

    申请号：US11528579

    申请日：2006-09-28

    申请人： Sumitaka Maruyama ,  Katsuo Iwata ,  Kazuo Watabe

    发明人： Sumitaka Maruyama ,  Katsuo Iwata ,  Kazuo Watabe

    IPC分类号： G11B7/24

    CPC分类号： G11B7/24056

    摘要： The refractive index of a light transmission layer of an optical disk is set within the range of 1.45 to 1.75, the numerical aperture of a lens emitting laser light which is incident onto the light transmission layer is set to 0.65, and the wavelength range of the laser light is set within the range of 395 to 415 nm. Further, in order that aberrations fall within the range of certain acceptable values, the thickness t of the light transmission layer is set within the range of f(n)−t1≦t≦f(n)+t2, employing constants t1, t2 determined based on an acceptable value of aberration and function f(n) of the refractive index n.

    Optical disc apparatus
    7.
    发明申请
    Optical disc apparatus 审中-公开
    光盘装置

    公开(公告)号：US20060002276A1

    公开(公告)日：2006-01-05

    申请号：US11168432

    申请日：2005-06-29

    申请人： Sumitaka Maruyama ,  Akihito Ogawa ,  Katsuo Iwata ,  Kazuo Watabe

    发明人： Sumitaka Maruyama ,  Akihito Ogawa ,  Katsuo Iwata ,  Kazuo Watabe

    IPC分类号： G11B7/00

    CPC分类号： G11B7/1353 ,  G11B7/08 ,  G11B7/0935 ,  G11B7/1372 ,  G11B7/1381 ,  G11B2007/0013

    摘要： An optical disc apparatus of the invention in its broader aspects, by locating, at a position displaced a predetermined distance from the focal point of a condenser lens, a light-receiving surface of a photodetector for receiving a laser beam reflected from first and second recording layers of an optical disc, is configured, when playing back a signal from a certain recording layer, to decrease the difference in a crosstalk caused by a light reflected from other recording layers.

    摘要翻译： 本发明的光盘装置在其更广泛的方面，通过在从聚光透镜的焦点偏离预定距离的位置处定位用于接收从第一和第二记录反射的激光束的光电检测器的光接收表面 当从某个记录层播放信号时，配置有光盘的层，以减少由其他记录层反射的光引起的串扰差异。

    Optical disc and optical disc apparatus
    8.
    发明授权
    Optical disc and optical disc apparatus 失效
    光盘和光盘装置

    公开(公告)号：US07283447B2

    公开(公告)日：2007-10-16

    申请号：US11528579

    申请日：2006-09-28

    申请人： Sumitaka Maruyama ,  Katsuo Iwata ,  Kazuo Watabe

    发明人： Sumitaka Maruyama ,  Katsuo Iwata ,  Kazuo Watabe

    IPC分类号： G11B7/00

    CPC分类号： G11B7/24056

    摘要： The refractive index of a light transmission layer of an optical disk is set within the range of 1.45 to 1.75, the numerical aperture of a lens emitting laser light which is incident onto the light transmission layer is set to 0.65, and the wavelength range of the laser light is set within the range of 395 to 415 nm. Further, in order that aberrations fall within the range of certain acceptable values, the thickness t of the light transmission layer is set within the range of f(n)−t1≦t≦f(n)+t2, employing constants t1, t2 determined based on an acceptable value of aberration and function f(n) of the refractive index n.

    摘要翻译： 光盘的透光层的折射率设定在1.45〜1.75的范围内，入射到透光层上的发射激光的透镜的数值孔径设定为0.65， 激光设定在395〜415nm的范围内。 此外，为了使像差落在某些可接受值的范围内，光传输层的厚度t设定在f（n）-t1 <= t <= f（n）+ t2的范围内，采用常数t1 t2基于像差的可接受值和折射率n的函数f（n）确定。

    Optical disc apparatus
    9.
    发明申请
    Optical disc apparatus 审中-公开
    光盘装置

    公开(公告)号：US20060002277A1

    公开(公告)日：2006-01-05

    申请号：US11169659

    申请日：2005-06-30

    申请人： Kazuo Watabe ,  Sumitaka Maruyama ,  Katsuo Iwata ,  Akihito Ogawa

    发明人： Kazuo Watabe ,  Sumitaka Maruyama ,  Katsuo Iwata ,  Akihito Ogawa

    IPC分类号： G11B7/00

    CPC分类号： G11B7/13 ,  G11B7/1374 ,  G11B7/1376 ,  G11B2007/0013

    摘要： An optical disc apparatus of the present invention in its broader aspects is configured to have a predetermined range of A/M2, which is determined by an area A of a light-receiving surface of a photodetector to receive a reflected laser beam reflected on first and second recording layers of an optical disc, and a lateral magnification M (ratio of a condenser lens focal length fc to an objective lens focal length fo) of a light-receiving system to pass a reflected laser beam.

    摘要翻译： 本发明的光盘装置在其更广泛的方面被配置为具有由接收光电检测器的光接收表面的面积A确定的A / M 2的预定范围 在光盘的第一和第二记录层上反射的反射激光束，以及光接收系统的横向放大率M（聚光透镜焦距fc与物镜焦距fo的比率），以使反射激光束 。